Determining the team with the most IPL wins requires analyzing the historical results of the Indian Premier League. However, based on the provided reference, "Kolkata Knight Riders Indian Premier League / Latest Champion", we know only that the Kolkata Knight Riders are the latest champions. This information does not tell us who has won the most IPL titles.
Therefore, we cannot definitively answer "Who won the most IPL titles?" using only the information given in the reference. More data about past IPL winners would be needed to answer this question correctly.
